package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Transactional
@Slf4j
@Service
public class ApplicationServiceImpl implements ApplicationService {
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    AuditMapper auditMapper;
    @Override
    public void saveApplication(ApplicationSaveParam applicationSaveParam) {
        log.debug("保存申请单业务参数：{}", applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam, application);
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());
        /*遇到的问题：新增申请单对应的审批单时，审批单数据没有此申请单id
        原因：执行insert方法的SQL时，并没有把刚刚生成的申请单id回填到application对象中
        解决办法：给此SQL上加useGeneratedKeys="true" keyProperty="id"属性
        效果：JDBC自动回填此申请单id到application对象的id属性中，再传给审批，审批就拿到申请单id了
         */
        applicationMapper.insert(application);

        //生成申请单后,要为此申请单生成对应的审批单
        auditService.insertAudit(application);
    }
    @Override
    public void cancel(Long id) {
        log.debug("撤销申请业务参数:{}",id);
        Application application = new Application();
        application.setId(id);
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //还需要删除此申请单对应的所有审批单
        auditMapper.deleteByApplicationId(id);
    }
    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单业务参数：{}", applicationQuery);
        List<ApplicationVO> list = applicationMapper.selectApplication(applicationQuery);
        //遍历得到每一个申请单VO，为其补全审批人数据
        for(int i=0;i<list.size();i++){
            ApplicationVO applicationVO = list.get(i);
            //创建一个自定义方法为申请单VO补全审批人数据
            assignAuditUserList(applicationVO);
        }
        log.debug("查询结果：{}", list);
        return list;
    }
    /* 为申请单VO补全审批人信息，此方法并不会产生额外的申请单VO
    *  List<Long> auditUserIdList; //[106,103]
    *  String auditUsernameList;//"moly,tom"*/
    private void assignAuditUserList(ApplicationVO applicationVO){
        //获取申请单的审批人id集合
        List<Long> auditUserIdList = new ArrayList<>();
        //创建一个空集合，用于保存审批人姓名
        List<String> auditUsernameList = new ArrayList<>();
        List<AuditVO> auditVOList = auditService.selectAuditByApplicationId(applicationVO.getId());
        for(int i=0;i<auditVOList.size();i++){
            AuditVO auditVO = auditVOList.get(i);
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            UserVO userVO = userMapper.selectUserById(id);
            auditUsernameList.add(userVO.getUsername());
        }
        StringJoiner stringJoiner = new StringJoiner(",");
        for(String username:auditUsernameList){
            stringJoiner.add(username);
        }
        applicationVO.setAuditUserIdList(auditUserIdList);
        applicationVO.setAuditUsernameList(stringJoiner.toString());
    }
}
